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Equity - Capital information (Details) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2017 ARS ($) Vote $ / shares shares | Jan. 01, 2018 shares | Dec. 31, 2016 $ / shares shares | Dec. 31, 2015 $ / shares shares
Equity |  |  |  |
Nominal value of issued shares | $ | $ 984,380,978 |  |  |
Nominal value (in pesos per share) | $ / shares | $ 1 |  | $ 1 | $ 1
Number of votes per share | Vote | 1 |  |  |
Outstanding shares | 969,159,605 |  |  |
Treasury shares (in shares) | 15,221,373 |  | 15,221,373 | 15,221,373
Total capital stock (in shares) | 984,380,978 |  | 984,380,978 | 984,380,978
Shares issued | 984,380,978 |  |  |
Major ordinary share transactions |  |  |  |
Equity |  |  |  |
Outstanding shares |  | 2,153,688,011 |  |
Treasury shares (in shares) |  | 15,221,373 |  |
Shares issued |  | 2,168,909,384 |  |
Class "A" |  |  |  |
Equity |  |  |  |
Outstanding shares | 340,994,852 |  |  |
Shares issued | 340,994,852 |  |  |
Class "A" | Major ordinary share transactions |  |  |  |
Equity |  |  |  |
Outstanding shares |  | 683,856,600 |  |
Shares issued |  | 683,856,600 |  |
Class "A" | Preliminary Merger Agreement and the Final Merger Agreement |  |  |  |
Equity |  |  |  |
Shares issued | 342,861,748 |  |  |
Class "B" |  |  |  |
Equity |  |  |  |
Outstanding shares | 627,930,005 |  |  |
Treasury shares (in shares) | 15,221,373 |  |  |
Shares issued | 643,151,378 |  |  |
Number of shares each ADS represents | 5 |  |  |
Class "B" | Major ordinary share transactions |  |  |  |
Equity |  |  |  |
Outstanding shares |  | 627,930,005 |  |
Treasury shares (in shares) |  | 15,221,373 |  |
Shares issued |  | 643,151,378 |  |
Class "C" |  |  |  |
Equity |  |  |  |
Outstanding shares | 234,748 |  |  |
Shares issued | 234,748 |  |  |
Class "C" | Major ordinary share transactions |  |  |  |
Equity |  |  |  |
Outstanding shares |  | 234,748 |  |
Shares issued |  | 234,748 |  |
Class "D" | Major ordinary share transactions |  |  |  |
Equity |  |  |  |
Outstanding shares |  | 841,666,658 |  |
Shares issued |  | 841,666,658 |  |
Class "D" | Preliminary Merger Agreement and the Final Merger Agreement |  |  |  |
Equity |  |  |  |
Shares issued | 841,666,658 |  |  |

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